Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb50736b1e489e8…

MALICIOUS

PDF

35.7 KB Created: 2020-08-31 01:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54ae0d92bbf0f1e4a5ed284881b47d61 SHA-1: d03a2665288b727dec1419f3941efde7b074fb9b SHA-256: 8cb50736b1e489e887dba6275724de778e6adf0536e85c18547a172f7cba0d18
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, 'https://ttraff.ru/wix?keyword=12+gauge+armor+piercing+mini+missile', is the primary indicator of malicious intent. The document also contains a large number of external PDF links, suggesting a link farm or SEO poisoning attempt, which is also flagged as malicious. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=12+gauge+armor+piercing+mini+missile
    • https://static.usrfiles.com/ugd/b5aed9_8eff698678bf477b89c113903a22dcee.pdf
    • https://static.usrfiles.com/ugd/39cb9d_7136e5cc5375471188dcf105eddd9d37.pdf
    • https://static.usrfiles.com/ugd/3f4b99_0a5aadd87fcb4469bd4b07b73c3a7b82.pdf
    • https://static.usrfiles.com/ugd/9c0842_89c83d03a24c4f31a705726fc557b86b.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/91284899981.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/gizej.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_e2ee8963c75e430ca9e0a5fd1f15ccaa.pdf
    • https://static.usrfiles.com/ugd/79e0dc_84f055078eee40b39ffa1c795b650df1.pdf
    • https://static.usrfiles.com/ugd/b8c837_75560a67bc894a448044a18ddd58077f.pdf
    • https://static.usrfiles.com/ugd/a467d2_e04ba689c6034996b6282ae3b154aa27.pdf
    • https://static.usrfiles.com/ugd/b8c837_563e00509e5f4d25a3223ff5547c9d4d.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cc0.bin
1519799c56365c870782c0107c9351e01af89536e42e0148cd50986c9a97cfcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC0 5340 bytes
font_01_sfnt_off00005ed0.bin
38b78e019ff8a6def1efeb78597622dc40f2edc8cd2fe34cd4844214ab4b5a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 10300 bytes

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